version 1.59, 2005/09/27 04:44:37 |
version 1.60, 2005/09/27 05:13:24 |
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RAID devices have two main qualities that people buy them for: |
RAID devices have two main qualities that people buy them for: |
<br> |
<br> |
<ul> |
<ul> |
<li>Redundant |
<li>Redundancy |
<li>Repair |
<li>Repair |
</ul> |
</ul> |
You want a RAID unit to provide you with redundancy, so that if some drives |
You want a RAID unit to provide you with redundancy, so that if some drives |
fail your data is not lost. But once a drive has failed, you require your |
fail, your data is not lost. But once a drive has failed, you require your |
array to (automatically, most likely) perform the operations that repair |
array to (automatically, most likely) perform the operations to repair |
itself, so that it is functioning perfectly again. |
itself, so that it is functioning perfectly again. |
<p> |
<p> |
Some vendors (or like the above Adaptec case, ex-employee) have |
Some vendors (or like the above Adaptec case, ex-employee) have |
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work on other vendors' RAID cards, that is, once we get documentation |
work on other vendors' RAID cards, that is, once we get documentation |
or do some reverse engineering for their products. |
or do some reverse engineering for their products. |
<p> |
<p> |
But having been ignored for so long by these vendors, it is not clear when if |
But having been ignored for so long by these vendors, it is not clear when (if |
ever we will get around to writing that support for Adaptec RAID |
ever) we will get around to writing that support for Adaptec RAID |
controllers now. And Adaptec has gone and bought ICP Vortex, which |
controllers now. And Adaptec has gone and bought ICP Vortex, which |
may mean we can never get documentation for the |
may mean we can never get documentation for the |
<a href="http://www.openbsd.org/cgi-bin/man.cgi?query=gdt&sektion=4">gdt(4)</a> |
<a href="http://www.openbsd.org/cgi-bin/man.cgi?query=gdt&sektion=4">gdt(4)</a> |